Elements 13: Organizer won't play MOV files anymore, did so in Elements 11.

Upgraded photoshop elements 11 to 13 and now all of my MOV files faill to play, "system does not have requred codec". Running on Mac Pro with Yosemite. All else in photoshop elements seems to be working correctly. Quicktime player is installed. All same MOV files play fine when openned in Finder.